wolf elam listening devices malaysia plane search_00000827.jpg
wolf elam listening devices malaysia plane search_00000827.jpg

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    Listening tools help 'view' ocean floor

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Listening tools help 'view' ocean floor

CNN's Stephanie Elam is shown how a sensitive listening device called a hydrophone is used to search the ocean.

Listening tools help 'view' ocean floor

CNN's Stephanie Elam is shown how a sensitive listening device called a hydrophone is used to search the ocean.